abstract herbicides are the main sources of soil and water pollution in paddy fields. herbicides mobility to the surface and ground water is a major concern for human health and the environment. it is, therefore, necessary to investigate their fate and their interactions in natural ecosystems. to meet this purpose, field experiments were conducted to measure kinetic of thiobencarb dissipation i...

Liquid wastewater is essentially the water disposal of community after pure has been used in a variety applications. In recent years, heavy metal concentrations, besides other pollutants, have increased to reach dangerous levels for living environment many regions. Among metals lead most damaging effects on human health. It can enter body through uptake food (65%), (20%) and air (15%). With thi...

Tartrazine, a yellow menace, is widely being used in cosmetics, foodstuffs, medicines and textile. It is carcinogenic and also catalyzes allergic problems. In the present work the ability to remove Tartrazine from aqueous solutions has been studied using waste material-hen feathers, as adsorbent. Effects of pH, concentration of the dye, temperature and adsorbent dosage have been studied. Equili...

GURUPI ISOTHERMS PLOT (GIP): A TOOL WITH INTUITIVE AND FREE GRAPHIC INTERFACE AS AN ALTERNATIVE FOR THE CALCULATION OF ADSORPTION ISOTHERMA PARAMETERS. Gurupi Isotherms Plot (GIP) is a new software and has been developed to facilitate the study of absorptive processes. The adsorption isotherm parameters are determined by GIP in non-linearized way, current version implemented determine Langmuir,...

A Moroccan bentonite was activated by sodium carbonate (Na–Be), and a combined chemical thermal activation (Na–Be450). The materials characterization performed XRD, EDS, FTIR, SEM porosity measurements. efficiency of Na–Be Na–Be450 as low-cost adsorbents to remove nickel silver from aqueous solution checked. Langmuir, Freundlich Langmuir-Freundlich models were used for the analysis equilibrium ...

In this study, Saccharum bengalense(SB) was used as biosorbent for the removal of Mn (II) ions from aqueous solution. The influence of biosorbent dose, time, pH and temperature was investigated in the biosorption process. Studies showed that by increasing pH of the solution, metal removing efficiency of Saccharum bengalensefrom the aqueous environment was enhanced but to a specific extent, ...

The Temkin isotherm equation is increasingly being used to correlate adsorption isotherms of water contaminants. This research note shows that the as in environmental suffers from a fundamental flaw dimensional inconsistency. In addition, an important but frequently overlooked issue concerns approximate nature which limits its ability fit type I isotherms: it has neither Henry’s law limit at lo...

Acid and thermal treated sepiolite was organophilized by cationic exchange with several alkylammonium cations (octylammonium, hexadecylammonium, tetradecyltrimethylammonium, hexadecyltrimethylammonium). The adsorption capacity of BTEX from aqueous solutions evaluated through the isotherms performed in batch. results were analysed using three isotherm models: Freundlich, Langmuir Dubinin-Radushk...

Pure silica zeolites are potentially hydrophobic and have therefore been considered to be interesting candidates for separating alcohols, e.g., 1-butanol, from water. Zeolites are traditionally synthesized at high pH, leading to the formation of intracrystalline defects in the form of silanol defects in the framework. These silanol groups introduce polar adsorption sites into the framework, pot...